编辑表单时在选择框下拉列表中获取数据-Laravel 5.2 [英] Get data in select-box dropdown when editing form - Laravel 5.2

问题描述

返回并编辑产品时，如何将数据保存在选择框中?

How would I keep my data in my select box when going back and editing a product?

这是我的带有父类别和子类别的表单:

Here is my form with parent and sub-categories:

          <form role="form" method="POST" action="{{ route('admin.product.update', $product->id) }}">
                {{ csrf_field() }}


                <div class="col-xs-12 col-sm-6 col-md-6">
                    <div class="form-group{{ $errors->has('category') ? ' has-error' : '' }}">
                        <label>Parent Category</label>
                        <select class="form-control" name="category" id="category" data-url="{{ url('api/dropdown')}}">
                            <option value=""></option>
                            @foreach($categories as $category)
                                <option value="{{ $category->id }}">{{ $category->category }}</option>
                            @endforeach
                        </select>
                         @if($errors->has('category'))
                            <span class="help-block">{{ $errors->first('category') }}</span>
                        @endif
                    </div>
                    <br>
                </div>

                <div class="col-xs-12 col-sm-6 col-md-6">
                    <div class="form-group{{ $errors->has('cat_id') ? ' has-error' : '' }}">
                        <label>Sub-Category Category</label>
                        <select class="form-control" name="cat_id" id="sub_category">
                            <option value=""></option>
                        </select>
                        @if($errors->has('cat_id'))
                            <span class="help-block">{{ $errors->first('cat_id') }}</span>
                        @endif
                    </div>
                    <br>
                </div>


                <div class="form-group col-md-12">
                    <button type="submit" class="btn btn-primary waves-effect waves-light">Edit Product</button>
                </div>

            </form>

这是我的功能，用于将结果编辑为表单:

Here is my function to get the results to edit form:

 /**
     * Return the view to edit & Update the Products
     *
     * @param $id
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function editProduct($id) {

        // Find the product ID
        $product = Product::findOrFail($id);

        // Get all Categories where parent_id = NULL
        $categories = Category::whereNull('parent_id')->get();


        // Return view with products and categories
        return view('admin.product.edit', compact('product', 'categories'));

    }

这是我的类别和子类别的类别模型:

Here is my Category Model for my categories and sub categories:

class Category extends Model {

    protected $table = 'categories';

    protected $fillable = ['category'];


    /**
     * One sub category, belongs to a Main Category ( Or Parent Category ).
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function parent() {
        return $this->belongsTo('App\Category', 'parent_id');
    }


    /**
     * A Parent Category has many sub categories
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function children() {
        return $this->hasMany('App\Category', 'parent_id');
    }


    /**
     * One Category can have many Products.
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function product() {
        return $this->hasMany('App\Product', 'id');
    }

}

这是我的产品表的产品型号:

Here is my Product Model for my products table:

class Product extends Model {

    protected $table = 'products';

    protected $fillable = [
        'product_name',
        'price',
        'cat_id',
        'featured',
        'brand_id',
    ];


    /**
     * One Product can have one Category.
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasOne
     */
    public function category() {
        return $this->hasOne('App\Category', 'id');
    }


}

这是我的类别和产品表的设置方式:

And here is how my categories and products table is set up:

仅告诉您，当我选择父类别时，会触发ajax调用并检索所有父子类别.我没有在这个问题中包括这一点.

Just to let you know, when I choose a parent category, a ajax call fires off and retrieves all the parent sub-categories. I have not included that in this question.

推荐答案

用于创建表单:

@foreach($categories as $category)
    <option value="{{ $category->id }}" @if(old('category')&&old('category')== $category->id) selected='selected' @endif >{{ $category->category }}</option>
@endforeach

对于编辑表单:

@foreach($categories as $category)
    <option value="{{ $category->id }}"  @if($category->id==$model->category) selected='selected' @endif >{{ $category->category }}</option>
@endforeach         

这篇关于编辑表单时在选择框下拉列表中获取数据-Laravel 5.2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！